Evaluation of the efficiency of Cr3+ → Cr4+ conversion in non-stoichiometric YAG: Cr ceramics

被引：2

作者：

Kravtsov, A. A. ^{[1
]}

Suprunchuk, V. E. ^{[1
]}

Lapin, V. A. ^{[1
]}

Malyavin, F. F. ^{[1
]}

Vakalov, D. S. ^{[1
]}

Tarala, L. V. ^{[1
]}

Medyanik, E. V. ^{[1
]}

Brazhko, E. A. ^{[1
]}

Chapura, O. M. ^{[1
]}

Tarala, V. A. ^{[1
]}

机构：

[1] North Caucasus Fed Univ, Pushkina St1, Stavropol 355009, Russia

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2024年 / 44卷 / 12期

关键词：

Ceramics; Stoichiometry; Valence conversion; Optical properties; YAG: Cr4+; OPTICAL-PROPERTIES; DEFECTS; IONS; CRYSTAL; STATE; LUMINESCENCE; DEVIATION;

D O I：

10.1016/j.jeurceramsoc.2024.04.078

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The aim of the work was to study the effect of the YAG: Cr ceramics' stoichiometry deviation on the optical properties and efficiency of valence conversion of Cr cations. YAG: Cr ceramic powders with deviations from stoichiometry ranging from 0.225 to -0.35 at % excess yttrium were synthesized by chemical precipitation. The optical and luminescent properties of YAG: Cr4+ ceramics, as well as the microstructure of the ceramics, were studied. It has been shown that small deviations from the stoichiometry of YAG: Cr (within 0.35 at %) do not have a significant effect on the optical transmission and microstructure of YAG: Cr3+ ceramics, but strongly affect some characteristics of YAG: Cr4+ ceramics. It was found that the presence of excess aluminum or yttrium cations in YAG: Cr4+ ceramics leads to a decrease in the concentration of Cr4+ and a deterioration in the conversion from Cr3+ to Cr4+.

引用

页码：7160 / 7169

页数：10

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